I figured Karl Rove and his friends at Crossroads weren't going to wait much longer before cutting Michele Bachmann's candidacy off at the knees, and here it is: A report in the Daily Caller (Tucker Carlson's private high-school newsletter) leaking the story about how people are "concerned" about her migraines and alleged heavy use of medications. They say they're talking about it now because if she gets the nomination, the story will come out too late to stop Obama:

The Minnesota Republican frequently suffers from stress-induced medical episodes that she has characterized as severe headaches. These episodes, say witnesses, occur once a week on average and can “incapacitate” her for days at time. On at least three occasions, Bachmann has landed in the hospital as a result.

[...] “She has terrible migraine headaches. And they put her out of commission for a day or more at a time. They come out of nowhere, and they’re unpredictable,” says an adviser to Bachmann who was involved in her 2010 congressional campaign. “They level her. They put her down. It’s actually sad. It’s very painful.”

Bachmann’s medical condition wouldn’t merit public attention, but for the fact she is running for president. Some close to Bachmann fear she won’t be equal to the stress of the campaign, much less the presidency itself.

“When she gets ‘em, frankly, she can’t function at all. It’s not like a little thing with a couple Advils. It’s bad,” the adviser says. “The migraines are so bad and so intense, she carries and takes all sorts of pills. Prevention pills. Pills during the migraine. Pills after the migraine, to keep them under control. She has to take these pills wherever she goes.”

To staff, Bachmann has implausibly blamed the headaches on uncomfortable high-heel shoes, but those who have worked closely with her cite stress, a busy schedule and anything going badly for Bachmann as causes.

Alice Stewart, a spokeswoman for Bachmann, said ”she suffers from migraines and they’re under control with medicine.” Stewart contested descriptions of the episodes as “incapacitating” Bachmann but did not specify how the descriptions were wrong. “The information you have is incorrect,” Stewart said. She declined to discuss Bachmann’s hospital visits at all, saying, “I’m not going to go into her medical history.”

On the evening of May 13, 2010, Bachmann flew to Los Angeles for a series of political and fundraising events. In part because of complications with her flight schedule, Bachmann’s mood plunged. During the entire six-hour flight, she was desperately sick from headaches.

[...] Of particular concern to some around her is the significant amount of medication Bachmann takes to address her condition.

The former aide says Bachmann’s congressional staff is “constantly” in contact with her doctors to tweak the types and amounts of medicine she is taking. Marcus Bachmann helps her manage the episodes.

Sources who spoke to The Daily Caller said they did so because they are terrified about the impact the condition could have on Bachmann’s performance if she actually became president. They also worry that the issue could blow up in the general election campaign, giving President Obama an easy path to re-election.

“It’s a careful choice of words I used: ‘incapacitated,’” the adviser says.

UPDATE: Brian Ross of ABC News got roughed up by Bachmann aides when he tried to question her today about this story after a campaign event.